EP 4053620 A1 20220907 - LIGHT ADJUSTING DEVICE
Title (en)
LIGHT ADJUSTING DEVICE
Title (de)
LICHTEINSTELLUNGSVORRICHTUNG
Title (fr)
DISPOSITIF DE RÉGLAGE DE LUMIÈRE
Publication
Application
Priority
- JP 2019200182 A 20191101
- JP 2020040822 W 20201030
Abstract (en)
A driver circuit applies a voltage such that a value of clarity of a light control sheet is 83% or less to bring the light control sheet into a first state, and applies a voltage such that a value of haze of the light control sheet according to JIS K 7136 is 15% or less to bring the light control sheet into a second state. The clarity is calculated from the following Formula (1): 100×LC−LR/LC+LR where L<sub>C</sub> is an intensity of straight light traveling straight along a traveling direction of parallel light entering the light control sheet, and L<sub>R</sub> is an intensity of narrow-angle scattered light having an angle within ± 2.5° relative to the traveling direction of the parallel light, in light that has passed through the light control sheet.
IPC 8 full level
G02F 1/13 (2006.01); G02F 1/1334 (2006.01)
CPC (source: CN EP US)
G02F 1/13306 (2013.01 - CN US); G02F 1/1334 (2013.01 - CN US); G02F 1/13345 (2021.01 - EP); G02F 1/13439 (2013.01 - US); G02F 1/1337 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 4053620 A1 20220907; EP 4053620 A4 20221228; CN 114556200 A 20220527; JP 2021071701 A 20210506; US 11640078 B2 20230502; US 2022299804 A1 20220922; WO 2021085604 A1 20210506
DOCDB simple family (application)
EP 20883059 A 20201030; CN 202080072191 A 20201030; JP 2019200182 A 20191101; JP 2020040822 W 20201030; US 202217729623 A 20220426